<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <div>
            <span>姓名:</span>
            <input v-model.trim="name" type="text" />
        </div>
        <div>
            <span>年龄:</span>
            <input v-model.number="age" type="number" />
        </div>
        <div>
            <span>性别:</span>
            <select v-model="gender">
                <option value="男">男</option>
                <option value="女">女</option>
            </select>
        </div>
        <div>
            <button @click="addshuju">添加/修改</button>
        </div>
        <div>
            <table border="1" cellpadding="10" cellspacing="0">
                <tr>
                    <th>序号</th>
                    <th>姓名</th>
                    <th>年龄</th>
                    <th>性别</th>
                    <th>操作</th>
                </tr>
                <tr v-for="(item, index) in list" :key="item.id">
                    <td>{{index+1}}</td>
                    <td>{{item.name}}</td>
                    <td>{{item.age}}</td>
                    <td>{{item.gender}}</td>
                    <td>
                        <button @click="dilite(item.id)">删除</button>
                        <button @click="change(item.id)">编辑</button>
                    </td>
                </tr>
            </table>
        </div>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                name: '',
                age: '',
                gender: '',
                tianorgai: true,
                xiugaiid: '',
                list: [
                    { id: 1, name: 'Tom', age: 19, gender: '男' },
                    { id: 2, name: 'Jone', age: 21, gender: '女' }
                ]
            },
            methods: {
                // 添加
                addshuju() {
                    if (!this.name) {
                        alert("姓名必填！")
                        return
                    }
                    if (typeof this.age !== 'number') {
                        alert("年龄必须是数字！")
                        return
                    }
                    if (this.tianorgai) {
                        this.list.push({
                            id: +new Date(),
                            name: this.name,
                            age: this.age,
                            gender: this.gender
                        })

                    } else {
                        this.list.filter((item) => {
                            if (item.id === this.xiugaiid) {
                                item.name = this.name
                                item.age = this.age
                                item.gender = this.gender
                                this.tianorgai = true
                            }
                        })
                    }
                    this.name = ''
                    this.age = ''
                    this.gender = ''
                },

                // 编辑
                change(id) {
                    this.list.filter((item) => {
                        if (item.id === id) {
                            this.name = item.name
                            this.age = item.age
                            this.gender = item.gender
                            this.xiugaiid = id
                            this.tianorgai = false
                        }
                    })
                },

                // 删除
                dilite(id) {
                    this.list = this.list.filter(item => item.id !== id)
                }
            }
        })
    </script>
</body>

</html>